Physical science students practicing ionic bonding. https://t.co/ZPQN0xalnE http://pic.twitter.com/J24Yh8ituW — Pine Grove Middle (@PGMVikings) October 28, 2016
Physical science students practicing ionic bonding. https://t.co/ZPQN0xalnE http://pic.twitter.com/J24Yh8ituW
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